One of the issues with legalizing marijuana is the inevitable surge of people who think they can go out and drive after smoking a fat ol' blunt. Not the case.

While there isn't really a breathalyzer for hitting bongs, cops still have ways to crack down on those dumb enough to drive while high.

Washington's law does change DUI provisions by setting a new blood-test limit for marijuana — a limit police are training to enforce. Lawyers are ready to challenge this, though, as a positive result could be from previous legal consumption that wasn't affecting their driving.

Colorado has no new DUI provisions, making them scramble to figure out how to handle it.

Here's what the Washington State Patrol had to say:

"We've had decades of studies and experience with alcohol. Marijuana is new, so it's going to take some time to figure out how the courts and prosecutors are going to handle it. But the key is impairment: We will arrest drivers who drive impaired, whether it be drugs or alcohol."

No matter what, drugged driving is illegal. It also isn't new. The issue here is whether or not there will be a surge once everything goes into effect, and what a legal limit of THC should be. The most popular vote is 5 nanograms of active THC.

The problem here is that active THC falls quickly, so they would have to get the blood sample super fast.

Sounds like a mess to us, but it doesn't have to be: Pot smokers — DON'T DRIVE after you've smoked, and there won't be a problem!

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